Dynamo-electric machine



(Model.) 2 sheets-sheet 1. H. C. SAMPLE & F. RABL. Dynamo Electric Machine.

No. 242,561. Patented June 7,1881.

#ge-S143* Fi Wem/for UNITED STATES PATENT OFFICEe HENRY C. SAMPLE ANI) FRANZ RABL, OF PHILADELPHIA, PENNSYLVANIA.

i DYNAMo-ELECTRIC MACHINE.

SPECIFICATIONv forming part of Letters Patent No. 242,561, dated June '7, 1881,

Application filed February Q1, 1881.

To all whom it may concern:

Be it known that we, HENRY C. SAMPLE and FRANZ RABL, both ot' the city and county of Philadelphia, and State of Pennsylvania,

have invented an Improvement in Dynamo- Electric Machines, of which the following is a specification.

Our invention relates to dyn a nio-electric mal ehines -in general, but more particularly to 1o that class ot' machines whose field-magnets are adapted to be changed from intensity to quantity; and it consists in constructing the binding-posts in such a manner and with such a relation to each other that the wires ofthe inducing electro-magnets may be coupled in any manner desired; further, in the combination ot' a ring-armature and electro-magnets, in which the poles of the magnets almost completely encircle and inclose the said armature 5 2o further, in the construction of the armature;

and, nally, in the adjustable arms carrying the brushes, allot' which is more fully set forth in the following specification, and shown in the accompanying drawings.

The object of our invention is to construct a dynamo-electric machine for technical instruction purposes, as well as practical work, to be capable of changing` the coupling ot the electro-magnets of said machine from quantity 3o to intensity, and to be able to readily adjust the brushes to red nce the spa-rk, and to cheapen the construction generally.

In the drawings,Figure lisa sectional plan ofour improved dynamo-electric machine when coupled up for quantity. Fig. 2 is an elevation of same with one-halt' in section. Fig. 3 is a side elevation of the armature. Fig. 4 is a perspective view ot the brush-holders and their standard. Figs. 5 and G are views of 4o connecting plugs and wires. Fig. 7 is a perspective view of several pieces ot' perforated plate and wire-gauze of which the armaturecore is composed. A is the bed-plate of the machine.

B are the bearin gs.

C is the armature-shaft, provided with angled beariu gs to prevent lateral movement, and has secured to it .the drivingpulley C'.

D is the armature, and is secured to the 5o shaft C, between the bearings B, said armature being composed of alternate rings of per- (Model.)

NVe do not confine ourselves to the particu- Y lar method of coupling up the armature, for when the armature is coupled up for quantity there will be only one-halt' the number of contact-pieces as when coupled for intensity.

Secured to frame A, on either side of the armature D, are compound electro-magnets I J I' J'. The poles K L are of one polarity, and poles K' L' of the opposite polarity. The magnet-cores are rectangular, round, or elliptical tubes, the inner ones, J J', being of smaller diameter than the outer ones, I I', and may be made, it' desired, of solid metal. The magnets I and I' have pole-pieces K K', which almost completely encircle and surround the armature, as shown in Figs. l and 2, and the inner poles, L L', are slightly curved vertically to conform to the curve otl the armature, as shown in Fig. 2.

It' desired, the armature may be round in cross-section, in which case the pole-pieces would be correspondingly modified in shape.

The cores I I' J J may be wound with any number of coils of insulated wire desired; but, for explanation, let it he conceived that two coils are used on each core. rlhen the screwcup V is connected to the inner coil on magnet i. Screw-cup Wv is connected with inner coil on magnet J. Screw-cup X is connected with outer coil on magnet I, and screw-cup Y is connected with outer coil on magnet J. rIhe compound electro-magnets on the other side ot' the armature are connected to screw-cups V' WV' X' Y', and in precisely the same manner. The screw-cups are adapted to be coupled two and two by plugs Z.

It' desired, the wires which are wound about the electro-magnets may be connected from one side ot' the armature to the other.

The end of the shaft Gis hollow, and through it the wires from the armature are passed and TOO connected to the contact-pieces of the commutator M, which may be ot' the usual construction.

The brushes O and O' are adjustable in pins secured to and insulated from the adjustable arms P P', which are provided with eye-rings p p, through which the stud Q passes, and is secured to the standard It. The arms P P' are also provided with arms p',provided with slots p3 in them, and through which a clampingscrew, p2, passes to secure them in any desired position to the standard It.

If desired, the arms p' may be simply clampedtogether by the bolt p3, and without clamping them to the standard, as they may be secured in place by the stud O.

The brushes O 0' are respectively electrically connected to binding-posts U and U'. There is also a binding-post, S, on one side of the machine, and Ton the other. The connectin g-plugs Z, having wires and ends t, are four in number. Those without wires are two in number. The wires Z', without plugs, are four in number.

The operation is as follows: To connect the Held-magnets up for quantity, plugs Z, with wires t, are inserted in holes between screw-cups V W, X Y, V' IV', and X'Y', and the wires t secured to the binding-posts S, T, U, and U', as follows: that from between screw-cups V W with post S 5 that trom between screw-cups X Y with post U; that from between screwcups Y' X' with post T, and that from between screw-cups V' W' with post U'. This is shown in Fig. l. The current passes in at post S through the inner coils ot' magnets I and J at the same time, then through both the outer coils to post U, then through brush O, commutator, armature, back to commutator, through brush 0', post U', through the inner coils ot' magnets I' and J', then through the outer coils ot' same, then to post T and to line, and back to post S. To connect for intensity, screw-cups X and XV are connected together by a plug, and also the screw-cups X' and W' by another plug, and the post S with cup V by a wire, Z', post U with cup Y by a wire, Z', post U' with cup V' by a wire, Z', and post T with cup Y by a wire, Z'. In this case the current passes in at S, and after traversing successively both coils ot' the magnets I it passes to magnet J, and at'ter traversing both coils of this magnet it passes through the armature as before, and then traverses both the magnets I' and J', passing irst successively through all the coils of magnet I', and then through all the coils of magnet J', then passes to line by post T, and finally ends in post S.

We do not limit ourselves to the exact means of coupling the wires or screw-cups, &c as it may be donc in many convenient ways-as, for instance, by switches.

te do not claim anything with reference to coupling up the armature.

Having now described our invention, what we claim as new, and desire to secure by Letters Patent, is-

l. In a dynamo-electric machine, an armature composed of a core made up of alternate insulated layers otl perforated sheet metal and wire-gauze, held by a series of pole-pieces and wrapped with a corresponding series of wire coils, the ends of which are connected tothe coinmutator, substantially as shown and described.

2. In a dynamoelectric machine, an armature composed ot' a core made up ot' alternate insulated layers of perforated sheet metal and wire-gauze held by a series of pole-pieces and wrapped with n corresponding series of wire coils between said pole-pieces, in combination with compound magnets, the pole-pieces ot' which almost completely encircle and surround said armature, substantially as and tor the purpose specied.

3. In a dynamo-electric machine, compound electro-magnets, eonsistingot' two electro-inagnets, oneot'which surrounds the other, in combination with an armature, screw-cups, and binding-posts, or equivalent means, whereby the electro-magnets ot' said machine may be coupled up for intensity or quantity without altering the construction ot' the magnets, as and t'or the purpose set forth.

4. In a dynamo-electric machine, a commutator, in combination with brushes and their supports, said supports beingseparate and pivoted on a lineconcentric with the commutator, and independently adjustable about said commntator, and means to secure said adjustable arms independentlyin any desired position rigidly to the base ofthe machine, or a standard secured thereon, as and t'or the purpose specitied.

5. In a dynamo-electric machine, the combi nation ot' a commutator, M, brushes O O', held in arms ID P'. provided with eye-pieces p, and ar1nsp',provided with slots p3, said arms being pivoted to the standard It by stud Q, and adapted to be adjusted vertically and secured in place by bolt p2 or its equivalent, substantially as shown and described.

In testimony of which invention we hereunto set our hands.

HENRY C. SAMPLE. FRANZ RABL.

litnesses:

Trios. J. HUNT, It. A. UAVIN.

IIO 

